Series 5751

FlowShield™ RP, Reduced pressure backflow prevention assembly

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Product Description

Reduced pressure backflow prevention assembly
Complete with:

  • Low lead/lead free epoxy coated cast iron body
  • Discharge air gap
  • Globe style shutoff valves

Connection Options:

  • Sizes: 2 1/2” - 4”
  • Connection Types: ANSI 150 Flange
     

Technical data

Material: cast iron
Maximum working temperature: 150 °F
Maximum working pressure: 175 psi

Note

The Caleffi 5751 FlowShield™ RP is a testable, reduced pressure principle backflow preventer engineered for maximum defense in high-hazard applications. Constructed with a robust epoxy-coated cast iron body, this series is certified to NSF/ANSI/CAN 61 for superior corrosion resistance and durability in aggressive environments. Its precision-engineered design manages high flow with minimal pressure loss, often satisfying residual pressure requirements without supplemental boosting. Built for serviceability, the 5751 features a top-entry cover for rapid component access, ensuring that public health and system security are maintained with minimal downtime.

  • Corrosion-resistant longevity: Built with an NSF/ANSI/CAN 61 certified epoxy coating that resists aggressive water conditions to outperform standard valves in durability.
  • Zero-guesswork maintenance: Our all-in-one 4-part rebuild kits simplify the maintenance process and eliminate the risk of purchasing incompatible individual components.
  • High-efficiency flow performance: Engineered to manage high flow with minimal pressure loss, allowing you to meet residual pressure requirements without supplemental boosting.
  • High-hazard system protection: Provides a definitive barrier against backpressure and back-siphonage to ensure contaminants never compromise the potable water supply.
  • Rapid inline accessibility: The top-entry cover design reveals a generous opening for easy component access without removing the valve from the line.
  • Certified industry compliance: Fully listed and certified to ASSE 1013 and CSA B64.4 standards to ensure your system meets all local and national plumbing codes.

Certifications

ASSE 1013
CSA B64.4
NSF/ANSI/CAN 61
NSF/ANSI/CAN 372

Drawings and specifications

Part number Connection Actions
575106A 2 1/2" ANSI 150 flange
2D drawings
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3D models
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Tender text
CALEFFI, 575106A, FlowShield™ RP. Testable reduced pressure principle backflow preventer (Flanged) Epoxy coated cast iron body   Discharge air gap sold separately Connection: 2 1/2" ANSI 150 flange. Maximum working pressure: 175 psi. Maximum working temperature: 150 °F. Material: cast iron.
SCIP code
CODE UNDER ANALYSIS
575108A 3" ANSI 150 flange
2D drawings
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3D models
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Tender text
CALEFFI, 575108A, FlowShield™ RP. Testable reduced pressure principle backflow preventer (Flanged) Epoxy coated cast iron body   Discharge air gap sold separately Connection: 3" ANSI 150 flange. Maximum working pressure: 175 psi. Maximum working temperature: 150 °F. Material: cast iron.
SCIP code
CODE UNDER ANALYSIS
575110A 4" ANSI 150 flange
2D drawings
Download
Download
3D models
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Download
Tender text
CALEFFI, 575110A, FlowShield™ RP. Testable reduced pressure principle backflow preventer (Flanged) Epoxy coated cast iron body   Discharge air gap sold separately Connection: 4" ANSI 150 flange. Maximum working pressure: 175 psi. Maximum working temperature: 150 °F. Material: cast iron.
SCIP code
CODE UNDER ANALYSIS

Applications

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